Building built-in air conditioning system

ABSTRACT

A building built-in air conditioning system comprising: an external heat exchanger ( 1 ), a reversing valve ( 2 ), a compressor ( 4 ), and microporous tubes ( 9, 10, 11 ). The microporous tubes are metal capillaries bound on a construction steel bar ( 12 ) and integrated with the concrete by casting. each microporous tube has a first end welded to a first guiding tube and a second end welded to a second guiding tube, the plurality of microporous tubes are thus connected to the guiding tubes in parallel, the guiding tube on first ends of the microporous tubes is connected to the right-side port of the reversing valve  3 , the second guiding tube on the second ends of the microporous tubes is connected to the lower port of the external heat exchanger  1  through a throttle component  5 , the upper port of the external heat exchanger  1  is connected to the left-side port of the reversing valve  3 , the center common port of the reversing valve  3  is connected to the return-air intake of the compressor  4 , an inlet of the reversing valve  3  is connected to an outlet of the compressor  4 . The external heat exchanger may be at least one of the heat exchangers including an air-cooled heat exchanger, a water-cooled heat exchanger, a foundation heat exchanger, and a solar panel heat exchanger. The air conditioning system has the advantages of longer life span, lower noise, and lower level of maintenance. The carbon emission and electricity cost of an air conditioning system according the example embodiments are also low.

FIELD OF THE INVENTION

The present invention relates to a building built-in air conditioningsystem, and more particularly to a building built-in air conditioningsystem for heating and cooling.

BACKGROUND TECHNOLOGY

At present, for a regular air conditioner, an indoor fan coil unit ofthe air conditioner is used for heating or cooling. Because the specificheat of the air is small, the energy transfer for the heating or coolingprocess can only be realized by way of air convection, and thus theefficiency of the air conditioner is low. The lowest evaporationtemperature of the air-source hot water heating system of the airconditioner has to be lower than −20° C. When the condensing temperatureis about 50° C., no matter what refrigerant is used, the compressionratio required will be larger than 7, which is far beyond the normalcompression ratio work range of a regular air conditioner. This type ofair conditioner cannot be used in the northern part of China for heatingpurpose.

The inventor of the present invention had invented before a patent usingwater capillaries or water tubes for heating systems; however, by usingthe system, a large amount of energy will be lost during the heattransfer between water and air and thus the whole system's efficiency islow. Meanwhile, the cost for installing water pumps, heat exchangers andwater capillaries is much higher than the cost for the air-conditioningsystem disclosed in the present invention. Another shortcoming ofexisting systems is that when the system stops supply heat in winter,the water capillaries may be damaged.

SUMMARY OF THE INVENTION

One of the objectives of the present invention is to provide a newbuilding built-in air conditioning system.

The heating output of a heating system is: Q=SρC, where S stands for thesize of heat output area, ρ stands for heat conductivity, and C standsfor temperature. The heating efficiency of Carnot cycle is^(ε)=Ta/Ta−T0, where Ta stands for condensing temperature, and T0 standsfor evaporation temperature. Based on these two formulas, exampleembodiments of the present invention are intended to substantiallydecrease the heat transfer resistance of the air conditioning system,substantially increase the heat dissipation area of the air conditioningsystem, substantially decrease the condensing temperature of the airconditioning system, and increase the evaporation temperature of the airconditioning system. Thus the present invention provides a new airconditioning system having a high coefficient of performance. Forexample, in an example embodiment, when the condensing temperature is26° C., the room temperature is 18° C. The level of heat dissipation ofthe surface of the building concrete is higher than 70 W/m2. The energyloss during heat transfer is small. This satisfies the requirement ofheating when the outdoor temperature is below −20° C.

In an example embodiment of the present invention, a building built-inair conditioning system comprises an external heat exchanger, areversing valve, a compressor, a plurality of microporous tubes, whereinthe plurality of microporous tubes are metal capillaries, which arebound to the construction steel bars 12 and are integrated with theconstruction steel bars 12 as a whole piece by cement casting, eachmicroporous tube has a first end welded to a first guiding tube and asecond end welded to a second guiding tube, the plurality of microporoustubes are thus connected to the guiding tubes in parallel, the guidingtube on first ends of the microporous tubes is connected to theright-side port of the reversing valve 3, the second guiding tube on thesecond ends of the microporous tubes is connected to the lower port ofthe external heat exchanger 1 through a throttle component 5, the upperport of the external heat exchanger 1 is connected to the left-side portof the reversing valve 3, the center common port of the reversing valve3 is connected to the return-air intake of the compressor 4, an inlet ofthe reversing valve 3 is connected to an outlet of the compressor 4. Theexternal heat exchanger may be at least one of the heat exchangersincluding an air-cooled heat exchanger, a water-cooled heat exchanger, afoundation heat exchanger, and a solar panel heat exchanger. Thecompressor may be inverter compressor.

In an example embodiment of the present invention, a building built-inair conditioning system comprises an external heat exchanger, areversing valve, a compressor, a plurality of microporous tubes, whereinthe microporous tubes are metal capillaries, PERT capillaries or PBcapillaries or carbon fabric, the microporous tubes are attached to aceiling of a building and side walls of the building, each microporoustube has a first end welded to a first guiding tube and a second endwelded to a second guiding tube, the plurality of microporous tubes arethus connected to the guiding tubes in parallel, the first guiding tubeon first ends of the microporous tubes 9 attached to the ceiling isconnected to the first guiding tube on first ends of the microporoustubes 10 attached to the side walls through a capillary 19, anelectromagnetic valve 20 is connected to the capillary 19 in parallel,the second guiding tube on the second ends of the microporous tubes 10attached to the side walls is connected to the lower port of theexternal heat exchanger 1 through the throttle component 5, the upperport of the external heat exchanger 1 is connected to the left-side portof the reversing valve 3, the second guiding tubes on the second ends ofthe microporous tubes 9 attached to the ceiling is connected to theright-side port of the reversing valve 3, and a center common port ofthe reversing valve 3 is connected to the return-air intake of thecompressor 4.

In this example embodiment, reinforcing bars may be formed in themicroporous tubes. A heat conductive layer 16 made of graphite, sands,cement or metal powder is formed between the microporous tubes. Aninsulation layer 15 made of inorganic one-way heat conductive materialsor an vacuum insulation layer is formed on the heat conductive layer 16.One end of a water-cooled heat exchanger 17 is connected between theinlet of the reversing valve 3 and the outlet of the compressor 4. Theother end of the water-cooled heat exchanger 17 is connected to anindoor water tube.

In another example embodiment, a building built-in air conditioningsystem comprises an external heat exchanger, a reversing valve, aone-way valve, a dehumidifier, a throttle tube, a compressor, and aplurality of microporous tubes, wherein the microporous tubes are metalcapillaries, PERT capillaries or PB capillaries, the microporous tubesare attached to a ceiling of a building and a floor of the building,each microporous tube has a first end welded to a first guiding tube anda second end welded to a second guiding tube, the plurality ofmicroporous tubes are thus connected to the guiding tubes in parallel,the first guiding tube on first ends of the microporous tubes isconnected to the right-side port of the reversing valve 3 through theone-way valve 8, the upper port of the external heat exchanger 1 isconnected to the left-side port of the reversing valve 3, the secondguiding tubes on the second ends of the microporous tubes is connectedto the lower port of the external heat exchanger 1, a center common portof the reversing valve 3 is connected to the return-air intake of thecompressor 4, an inlet of the reversing valve 3 is connected to anoutlet of the compressor 4. The dehumidifier 28 is connected to theone-way valve 8 in parallel. The throttle tube 31 is connected betweenthe outlet of the one-way valve and the dehumidifier 28.

In another example embodiment of the present invention, a buildingbuilt-in air conditioning system comprises a base pile heat exchanger, areversing valve, an compressor expander, wherein the base pile heatexchanger 32 is formed by binding a plurality of microporous tubesaround the building construction steel bars 12 and integrating the aplurality of microporous tubes with the building construction steel bars12 by casting, or micro holes can be formed in the building constructionsteel bars that are built in the base pile, one end of the base pileheat exchanger 32 is connected to the left side port of the reversingvalve 3, the other end of the base pile heat exchanger 32 is connectedto a guiding tube connected to one end of the microporous tubes 9attached to the ceiling or floor through the compressor expander 33.

In an example embodiment of the present invention, a building built-inair conditioning system comprises an external heat exchanger, and acompressor, and a plurality of microporous tubes 12 or constructionsteel bars with micro holes formed therein, wherein the plurality ofmicroporous tubes or construction steel bars with micro holes areintegrated with the building concrete by casting, a guiding tube, whichis connected to one end of the microporous tubes or one end of theconstruction steel bars with micro holes, has an end connected the lowerport of an external heat exchanger through the throttle component 5, theupper port of the external heat exchanger 1 is connected to a side-portof the compressor, and the external heat exchanger may be at least oneof the heat exchangers including an air-cooled heat exchanger, awater-cooled heat exchanger, a foundation heat exchanger, and a solarpanel heat exchanger.

In another example embodiment, a building built-in air conditioningsystem comprises an external heat exchanger, a reversing valve, acompressor, and a plurality of microporous construction steel bars,wherein the plurality of microporous construction steel bars are weldedtogether to form a net-shaped heat exchanger first and then integratedwith the building concrete by casting, the plurality of microporousconstruction steel bars are connected to the a first guiding tube and asecond guiding tube in parallel, a first guiding tube is connected to anlower port of the external heat exchanger 1 through the throttlecomponent 5, the upper port of the external heat exchanger 1 isconnected to the left-side port of the reversing valve 3, a centercommon port of the reversing valve 3 is connected to the return-airintake of the compressor 4, an inlet of the reversing valve 3 isconnected to an outlet of the compressor 4.

In another example embodiment, a building built-in air conditioningsystem comprises an external heat exchanger, a reversing valve, acompressor, and a plurality of metal radiation plate, wherein each metalradiation plate is formed by heat pressing two metal plates face to faceinto one piece, a plurality of grooves are formed on the two metalplates correspondingly and when the two plate are heat-pressed, thecorresponding grooves form a plurality of guiding channels, the metalradiation plate is installed on the floor, ceiling or side walls of thebuilding, an inlet of the metal radiation plate is connected toleft-side port of the reversing valve 3, an outlet of the metalradiation plate is connected to the lower port of the external heatexchanger 1 through the throttle component 5, the upper port of theexternal heat exchanger 1 is connected to the left-side port of thereversing valve 3, a center common port of the reversing valve 3 isconnected to the return-air intake of the compressor 4, an inlet of thereversing valve 3 is connected to an outlet of the compressor 4, theexternal heat exchanger may be at least one of the heat exchangersincluding an air-cooled heat exchanger, a water-cooled heat exchanger, afoundation heat exchanger, and a solar panel heat exchanger.

In an example embodiment of the present invention, a building built-inair conditioning system comprises an external heat exchanger, areversing valve, a compressor, a plurality of microporous tubes, whereinthe microporous tubes are metal capillaries, PERT capillaries or PBcapillaries, the microporous tubes are attached to a ceiling of abuilding or a floor of the building, each microporous tube has a firstend welded to a first guiding tube and a second end welded to a secondguiding tube, the plurality of microporous tubes are thus connected tothe guiding tubes in parallel, the first guiding tube is connected tothe right-side port of the reversing valve 3, the upper port of theexternal heat exchanger 1 is connected to the left-side port of thereversing valve 3, a center common port of the reversing valve 3 isconnected to the return-air intake of the compressor 4, an inlet of thereversing valve 3 is connected to an outlet of the compressor 4.

Example embodiments of the present invention provide the followingadvantages:

1. The condensing tubes (microporous tubes) are integrated with thebuilding concrete by casting. Because the heat conductivity of theconcrete is 60 times larger than the heat conductivity of the air andalso because the building itself is used for heating or cooling, theheat transfer resistance between the air conditioning system and theheat dissipation terminal is low. Also, the low interior volume specificratio of the compressor can make the present air conditioner work withmaximum efficiency.

2. Because stainless steel microporous tubes or carbon steel microporoustubes have a strong tensile strength and the stainless steel microporoustubes or carbon steel microporous tubes are installed in the buildingwith high concentration, the stainless steel microporous tubes or carbonsteel microporous tubes can replace some construction steel bars. Thebuilding is therefore more robust.

3. The unit cost of the air conditioning system according to exampleembodiments of the present invention is relatively low compared topresent heating systems or present air conditioning systems. Because fansystems and water pumps are obviated from the heat dissipation terminalof the air conditioning system of the present invention, the current airconditioning system has the advantages of longer life span, lower noise,and lower level of maintenance.

4. The carbon emission and electricity cost of an air conditioningsystem according the example embodiments are low. In the area ofBeijing, by adopting an air conditioning system according to exampleembodiments of the present invention, the energy efficiency ratio canreach more than 4.5. This means that the electricity cost can be reducedby two-third in winter. In summer, the electricity cost can be reducedby 70%.

5. The steel microporous tubes according to example embodiments of thepresent invention each have a wall with the thickness of 0.6 mm and adiameter of 2.4 mm. The steel microporous tubes can bear a pressurelarger than 30 MPa. By casting the microporous tubes to the buildingconcrete, the strength of the steel microporous tubes is increasedfurther. The steel microporous tubes can be used with middle or highpressure refrigerant air conditioning system and can be used with carbondioxide air conditioning system.

6. When applying the technology disclosed in the present invention to anexisting building, the microporous tubes may be steel microporous tubes,bronze microporous tubes, or aluminum microporous tubes. PB and PEcarbon fabric can also be used. The cost of applying the technology islow and the building process is simple and environment friendly. Thecurrent system solves the problem that the water capillaries have duringwinter. For the air conditioning system with water capillaries beingused, the water capillaries are easily broken when the air conditioningsystem stops supplying heat. An air conditioning system according toexample embodiments of the present invention will not have this problem.

7. According to example embodiments of the present invention,microporous tubes can be bound to the concrete of the base piles of abuilding. This feature not only increases the strength of the buildingbase, but also allows the air conditioning system to utilize the energystored in the earth to generate heat in winter and generate cold insummer. When using an indoor fan coil unit with the air conditioningsystem according to example embodiments of the present invention, fastheating in winter and fast cooling and dehumidifying in summer can beachieved.

8. The air conditioning system according to example embodiments of thepresent invention can be used in individual houses with one or two airconditioning units and can also be used for whole building with one ortwo large air-cooling heat pump units. If the microporous tubes areinstalled correctly and there is no leakage, the microporous tubes canwork with the present invertor compressor or variable capacitycompressor for more than 10 years without a problem.

9. Example embodiments of the present invention provide a compressorwhich has an internal switch function. The two side portions of thecompressor are used for cooling and heating, respectively, based onwhether the electric motor of the compressor works under forwardrotation or reversal rotation. Thus, the reversing valve in the existingtechnology is obviated, the possibility of damage is decreased, and theloss of energy is also reduced.

10. According to example embodiments of the present invention, microholes can be formed in construction steel bars directly. Then theconstruction steel bars can be welded together like a net and cast withthe concrete. The two ends of the construction steel bars are connectedto the outdoor unit of the air conditioning system. Thus, the cost ofthe air conditioning system is reduced and the air conditioning systemis more reliable.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view according to an example embodiment of thepresent invention;

FIG. 2 is a side view showing a plurality of microporous tubes accordingto an example embodiment of the present invention;

FIG. 3 is a perspective view according to another example embodiment ofthe present invention;

FIG. 4 is a side view showing a plurality of microporous tubes accordingto another example embodiment of the present invention;

FIG. 5 is a perspective view according to another example embodiment ofthe present invention;

FIG. 6 is a perspective view according to another example embodiment ofthe present invention;

FIG. 7 a perspective view according to another example embodiment of thepresent invention; and

FIG. 8 a perspective view according to another example embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

FIG. 1 shows a building built-in air conditioning system according to afirst example embodiment of the present invention. As shown in FIG. 1,in a rectangular-shaped building, a plurality of microporous tubes 9 arebound to the construction steel bars 12 and are integrated with theconstruction steel bars 12 as a whole piece by cement casting. As shownin FIG. 2, when using a carbon dioxide out-door inverter compressor withthe power of 3.5-10 kw for the air conditioning system, each of theplurality of microporous tubes 9 has a wall with a thickness of 0.6 mmand a diameter of 2.4 mm. The length of each microporous tube is 30 m,and each microporous tube has a bearing pressure of 30 MPa. Eachmicroporous tube is folded at the middle of the tube. Each microporoustube has a first end welded to a first guiding tube and a second endwelded to a second guiding tube. The distance between adjacentmicroporous tubes is 4 cm. The plurality of microporous tubes are thusconnected to the guiding tubes in parallel with a distance of 4 cmbetween adjacent tubes. The plurality of microporous tubes can also bearranged in the ways shown in FIGS. 2B and 2C. By this configuration, ona floor with a size of 100 m², the plurality of microporous tubes canhave a total length of 2500 m. The total heat exchange surface area ofthe plurality of microporous tubes can thus be 18.8 m² and the totalcross-section area of the plurality of microporous tubes is 2 cm². Thetotal volume of the plurality of microporous tubes is 2.8 L. When usingR410 refrigerant outdoor compressor for the air conditioning system,each microporous tube has a length between 5-30 m and a wall with athickness of 0.3-0.5 mm. These parameters can provide enough pressurebearing capability to the microporous tubes. When used for heatingpurpose, the designed evaporation temperature of the air conditioningsystem is set to be 2-3 C lower than the outdoor temperature, and thedesigned condensing temperature of the air conditioning system is set tobe in the range of 24-30 C. An external heat exchanger 1 is installedfacing the sun shine. When the weather is not very cold, the airconditioning system works under half power after midnight when theelectricity price is half of the normal price during day time. Becausethe temperature difference between day time and night time is small, theexternal heat exchanger 1 will not frost. During the coldest season, theair conditioning system works with full power to store heat around noonduring day time while it is sunny and the temperature is the highest ofa day. At this time, the air humidity level is low and the temperaturedifference is small. Thus, defrost is not necessary. Because the overallvolume of the plurality of microporous tubes is smaller than the volumeof a normal in-door air conditioner, refrigerant flows faster in themicroporous tubes and better cycle effect can be obtained. The heatconductivity of reinforced concrete can reach 1.74 w/m.c. According tothis example embodiment, the indoor temperature can be easily controlledbetween 19-21 C. The heat is transmitted by way of infrared radiation. Acomfortable body feeling can thus be obtained.

In the northern part of China, it is very cold in winter time. However,the highest temperature during day time still can reach above −15 C andthe condensing temperature is 26 C. When room temperature is about 20 C,the temperature of the floor is about 24 C. The heat dissipation of thefloor 13 can reach 45 w/m2. The heat dissipation radiated from theceiling can reach 40 w/m2. The coefficient of performance COP can reachabout 4.0. The air conditioning system only needs to work for 12 hours aday to meet the heating need for a whole day. Thus, during the coldnight, the air conditioning system does not need to work. By using theair conditioning system according to the present invention, the utilitycost is only one-third of the cost for regular air conditioner duringthe whole winter, and the carbon emission is also only one-third of thatfor regular air conditioner. When the output temperature of thecompressor decreases to 30° C., the noise of the air conditioning systemwill be reduced by 30%.

In summer, as long as the evaporation temperature of the microporoustubes 10 can reach the range of 15-20° C., the building floor can becooled down to about 23 C and thus indoor temperature can be lower than26 C. Because reinforced concrete can store a large volume of coldenergy, the outdoor unit of the air conditioning system 7 can work aftermidnight while the temperature is at the lowest of a day. The compressorjust needs to work with half power and cold storage can be large enough.The coefficient of performance (COP) can reach 8.0. Further, electricityfee after midnight is just half of that for day time. Overall, theutility cost according to this example embodiment is only one-sixth ofthe cost using the present regular air conditioner. In the northern partof China, after midnight of a day in summer, the temperature is about20° C. The condensing temperature of the external heat exchanger 1 is30° C., which is enough to obtain optimum heat dissipation. When theevaporation temperature is set above 12° C. under this situation, theoutput power of the compressor 4 can be doubled. In other words, whenworking with half power, the air conditioning system can obtain the sameoutput power as that of a regular air conditioner working under fullpower.

As an option, microporous holes can be formed directly in theconstruction steel bars 12. The construction steel bars 12 with themicroporous holes can be arranged in a way shown in FIG. 2-B and thenthe construction steel bars 12 are cast in the building concrete. Theseconstruction steel bars can bear high pressure and have a large surfacearea. For example, if the diameter of the construction steel bars 12 is25 mm and a hole with a diameter of 1.2 mm is formed in the steel bars12, the steel bars are equivalent to microporous tubes with a wall of 14mm thickness. Thus, the steel bars 12 with the microporous holes canbear a pressure of several hundred Mpa and can be used withsupercritical carbon dioxide air conditioning system. The weld betweenthe construction steel bars and guiding bars are firm and will not havethe problem of leaking or blocking. Meanwhile, construction steel barshave the advantage of small temperature variation. Further, moreconstruction steel bars can make the building stronger.

In the northern part of China, heating is the main purpose of the airconditioning system. Therefore, in order to increase the heat output, itwould be better that the microporous tubes can be densely built on andcover a large area of the floor, ceiling, or the side walls of a room.

In places near sea or ocean, the air has high humidity levels. It wouldbe better for the microporous tubes to be built on the floor. Meanwhile,air exchange may be adopted to reduce humidity.

In hot areas, it would be better for the microporous tubes to be builton ceiling. Meanwhile, an indoor air cooling system may be adopted.

Example Embodiment 2

As shown in FIGS. 3 and 4, a plurality of PERT microporous tubes or PBmicroporous tubes are attached to the room ceiling 13 by cement mortar,or as an option, to the surface of the side walls by cement mortar. Awater tank 23 is disposed under the microporous tubes attached to theside walls. The microporous tubes also can be built on the floor byusing cement, sand or graphite.

Because this type of microporous tube can only bear low pressure, theycan be used with some middle or low pressure refrigerant cooling airconditioning system. The refrigerant may be R22, R134A, or R404. Insummer, when it is necessary to store cold energy in the airconditioning system, first, the electromagnetic valve 20 is turned off.Then, the throttle component 5 is adjusted to control the evaporationtemperature of the microporous tubes 22 attached to the side walls tothe range of 22-27° C. in order to avoid frost and keep the roomtemperature stable. The evaporation temperature of the microporous tubes9 attached to the ceiling 13 is controlled at around 15° C., which isthe same as the temperature of the return-air of the processor. Becausethe ceiling 13 is thick, it will not frost easily. When the temperatureof the ceiling reaches 22 C, the cold storage of the ceiling 13 canreach 40 kw. During night time, the air conditioning system stores coldenergy, and during day time, the stored cold energy can be used forcooling purpose. When it needs to cool down the room temperaturefurther, the electromagnetic valve 20 is turned on and the throttlecomponent 5 is adjusted to control the evaporation temperature of themicroporous tubes 22 to the range of 7-15° C. Then the frosting candehumidify and instantly cool down the room temperature. The water tank23 then discharges water generated by the frosting to outdoor.

A plate heat exchanger or a double-tube heat exchanger 17 is connectedto an outlet of the compressor 4. This arrangement not only reducesnoise but also saves space. Meanwhile, the heat generated by the coolingprocess can be used to heat residential water.

Each of the microporous tubes may have a cross section having a shapeshown in FIG. 4-A. This structure can increase heat dissipation surfacearea and also increase the bearing pressure of the microporous tubes.Meanwhile, the volume of the whole air conditioning system is reduced.

This type of microporous tubes can only bear at most a temperature of100° C. When being used for heating purpose in winter, the temperatureof the air output from the compressor 4 is about 80 C. The plate ordouble-tube heat exchanger 17 and the water pump 18 produce hot waterfor residential use by using the heat of the air output from thecompressor. The microporous tubes then only need to dissipate heat witha temperature of 30° C. Thus, the requirement for the heat dissipationand bearing pressure of the microporous tubes are satisfied.

As an option, the microporous tubes 22 attached to the side walls canuse end heat dissipation technique to increase the efficiency of the airconditioning system.

As shown in FIG. 4C, the microporous tubes can be glued to metal platesand the metal plates then can be used as a heat exchanger on walls orceilings. The cross-section of each of the microporous tubes may be of ashape as shown in FIG. 4-E in order to achieve a better heat dissipationeffect.

As shown in FIGS. 4-B and D, grooves or concaves are formed on twoaluminum plates by a carving or pressing process and then the twoaluminum plates are heat-pressed together to form a metal heatdissipation plate. A decoration may be formed on the metal heatdissipation plate and thus the metal heat dissipation plate becomes anintegral part of the building. The metal heat dissipation plate can beattached to walls, floors, or ceilings.

Example Embodiment 3

As shown in FIG. 5, a carbon fabric 26 is attached to the floor, ceilingand the side walls by using high strength heat conductive adhesive 25.Plastic materials such as PB, PP, or PE are heat cast on the two lateralends of the carbon fabric 26 to form two guiding tubes 24 on the twolateral ends of the carbon fabric 26. The two guiding tubes 24 areconnected to the outdoor unit 7.

Based on the formula ρ=2·wall thickness·(utensil strength/2), for acarbon fiber having a wall thickness of 30 μm and an internal diameterof 20 μm, the carbon fabric 26 can bear a pressure higher than 10 MPa.The overall surface of the carbon fabric 26 has a size larger than thearea that it covers on the floor, ceiling or the side walls. Normally,carbon fibers have high heat conductivity. The thickness of one layer ofthe carbon fabric 26 is smaller than 2 mm. When a damage happensaccidently on the carbon fabric, the high strength heat conductiveadhesive 25 can seal the damaged portion. The whole cross-sectional areaof the carbon fabric is larger than the cross-sectional area of theoutlet of the compressor 4. The interior volume specific ratio of thecompressor is thus small. The whole system's efficiency for heating orcooling is thus increased.

Example Embodiment 4

As shown in FIG. 6, a plurality of microporous tubes, which are of atleast one of the capillary types including metal capillaries, PERTcapillaries, and PB capillaries, are attached to the ceiling in parallelor installed on the floor in parallel. Each microporous tube has a firstend welded to a guiding tube and has a second end welded to anotherguiding tube. A guiding tube on one end of the microporous tubes isconnected to the right-side port of the reversing valve 3 through theone-way valve 8. The upper port of the external heat exchanger 1 isconnected to the left-side port of the reversing valve 3. Anotherguiding tube on the other end of the microporous tubes is connected tothe lower port of the external heat exchanger 1 through a throttlecomponent. The center common port of the reversing valve 3 is connectedto the return-air intake of the compressor 4. An inlet of the reversingvalve 3 is connected to an outlet of the compressor 4. The one-way valve8 is connected to the air-cooled heat exchanger 28 in parallel. Theoutlet of the one-way valve 8 is connected to the air-cooled heatexchanger 28 through a choke nozzle 31.

According to example embodiments of the present invention, themicroporous tubes can be installed on the floor directly and then themicroporous tubes are covered and made even by the graphite, sands andcement. The microporous tubes also can be attached to the ceiling byusing heat conductive adhesive. As described above, the microporoustubes are connected to the reversing valve 3 through the air-cooled heatexchanger 28. Because the graphite has a higher heat conductivity thanordinary metals, refrigerant flows into the microporous tubes directlythrough the one-way valve 8 when the air conditioning system is workingfor heating purpose. The temperature of the floor is almost the same asthe evaporation temperature in the microporous tubes. Thus theefficiency of the heating is increased. By using the heat in thecompressed air to heat up the fresh air entered, it will keep the roomair fresh.

In summer, the one-way valve 8 is turned off and the refrigerant entersinto the air-cooled heat exchanger 28 through the choke nozzle 31. Theevaporation temperature in the microporous tubes is about 20° C. Theroom temperature is gradually lowered and the frost is prevented. Ifneeded, the air-cooled heat exchanger 28 can be used to cool down thetemperature quickly.

Example Embodiment 5

At the stage of building the base of a construction, a plurality ofstainless steel microporous tubes or a plurality of carbon steelmicroporous tubes can be bound to the concrete of the base piles and beintegrated with the concrete to become a one piece by cement casting.The microporous tubes can replace the air-cooled heat exchanger of theoutdoor unit 7 to provide heat or cold to the first floor or the secondfloor of a building. As shown in FIG. 7, this type of microporous tubeshas a thick wall, and a large diameter. Thus this type of microporoustubes has a high strength and can replace the construction reinforcesteel bars 12. The cost of the construction can thus be lowered and iseven lower than using the air-cooled heat exchanger. Because theevaporation temperature is very high in winter and the condensingtemperature is very low in summer, and further because no fans areadopted, the cooling and the heating efficiency are substantiallyincreased. Further, the noise of the outdoor unit 7 can thus be reduced.The reliability and the life span of the air conditioning system arethus increased. When heating is the main use of the air conditioningsystem, a heat insulation layer 23 can be formed on the floor first.

Example Embodiment 6

The current compressors used in air conditioning system usually has ahigh power output. When this type of compressor is used in the airconditioning system according to the example embodiments of the presentinvention, its efficiency cannot be fully used. Also, reversing valve isa type of easily damaged component.

According to an example embodiment of the present invention, acompressor comprises a middle portion, which is an electric motor, aright side portion, which is a heat pumper chamber, and a left sideportion, which is a cooling chamber. When the electric motor works underforward rotation, the right side portion of the compressor compressesthe air and the left side portion acts as a through channel. When theelectric motor works under reversal rotation, the left side portion ofthe compressor works compresses the air for cooling purpose and theright side portion acts as a through channel.

The optimum compression ratio of the compressor can be adjusted based onthe need of cooling or heating. In an example embodiment, the condensingpressure of the cooling side portion is set to a value corresponding tocondensing temperature of 30° C. The evaporation pressure of the heatingside portion is set to a value corresponding to evaporation temperatureof 20° C. The compression ratio is smaller than 1. The energy efficiencyratio can be at least above 15. In another example embodiment, thecondensing pressure of the cooling side portion is set to a valuecorresponding to condensing temperature of 25-30° C. The evaporationpressure of the heating side portion is set to a value corresponding toevaporation temperature of −10° C.±15° C. The compression ratio islarger than 3. The energy efficiency ratio can be between 4-6.

The shell of the compressor is made from aluminum to further decreasenoise of the system.

No matter it is a heating process or a cooling process, the motor of thecompressor is always used for dissipating the heat of the gassedrefrigerant. The reversing valve is obviated. The compressor accordingto the example embodiments of the present invention is more reliable andhas lower level of maintenance.

What is claimed is:
 1. A building built-in air conditioning system,comprising: an external heat exchanger; a reversing valve; a compressor;and a plurality of microporous tubes; wherein the plurality ofmicroporous tubes are metal capillaries, which are bound to theconstruction steel bars 12 and are integrated with the constructionsteel bars 12 as a whole piece by cement casting, each microporous tubehas a first end welded to a first guiding tube and a second end weldedto a second guiding tube, the plurality of microporous tubes are thusconnected to the guiding tubes in parallel, the guiding tube on firstends of the microporous tubes is connected to the right-side port of thereversing valve 3, the second guiding tube on the second ends of themicroporous tubes is connected to the lower port of the external heatexchanger 1 through a throttle component 5, the upper port of theexternal heat exchanger 1 is connected to the left-side port of thereversing valve 3, the center common port of the reversing valve 3 isconnected to the return-air intake of the compressor 4, an inlet of thereversing valve 3 is connected to an outlet of the compressor 4, whereinthe external heat exchanger is at least one of the heat exchangersincluding an air-cooled heat exchanger, a water-cooled heat exchanger, afoundation heat exchanger, and a solar panel heat exchanger.
 2. Thebuilding built-in air conditioning system according to claim 1, whereineach microporous tube has an internal hole with a diameter smaller than3 mm, when the microporous tubes are connected in parallel and whenheating is the main function of the air conditioning system, the totalcross-sectional area of the microporous tubes should be larger than orat least equal to the area of the outlet of the compressor, wherein thetotal cross-sectional area of the microporous tubes equalscross-sectional area of each microporous tube multiplying the totalnumber of microporous tubes; when cooling is the main function of theair conditioning system, the total cross-sectional area of themicroporous tubes should be larger than or at least equal to the area ofthe return-air intake of the compressor, wherein the totalcross-sectional area of the microporous tubes equals the cross-sectionalarea of each microporous tube multiplying the total number ofmicroporous tubes; the total volume of the microporous tubes shouldsatisfy the requirement of refrigerant oil ratio for two or moreinvertor compressors, wherein the total volume of the microporous tubesequals to the length of the microporous tubes multiplying the totalcross-sectional area of the microporous tubes.
 3. A building built-inair conditioning system, comprising: an external heat exchanger; areversing valve; a compressor; and a plurality of microporous tubes,wherein the microporous tubes are metal capillaries, PERT capillaries orPB capillaries or carbon fabric, the microporous tubes are attached to aceiling of a building and side walls of the building, each microporoustube has a first end welded to a first guiding tube and a second endwelded to a second guiding tube, the plurality of microporous tubes arethus connected to the guiding tubes in parallel, the first guiding tubeon first ends of the microporous tubes 9 attached to the ceiling isconnected to the first guiding tube on first ends of the microporoustubes 10 attached to the side walls through a capillary 19, anelectromagnetic valve 20 is connected to the capillary 19 in parallel,the second guiding tube on the second ends of the microporous tubes 10attached to the side walls is connected to the lower port of theexternal heat exchanger 1 through the throttle component 5, the upperport of the external heat exchanger 1 is connected to the left-side portof the reversing valve 3, the second guiding tubes on the second ends ofthe microporous tubes 9 attached to the ceiling is connected to theright-side port of the reversing valve 3, and a center common port ofthe reversing valve 3 is connected to the return-air intake of thecompressor
 4. 4. The building built-in conditioning system according toclaim 3, wherein reinforcing bars are formed in the microporous tubes, aheat conductive layer 16 made of graphite, sands, cement or metal powderis formed between the microporous tubes, an insulation layer 15 made ofinorganic one-way heat conductive materials or an vacuum insulationlayer is formed on the heat conductive layer 16, one end of awater-cooled heat exchanger 17 is connected between the inlet of thereversing valve 3 and the outlet of the compressor 4, the other end ofthe water-cooled heat exchanger 17 is connected to an indoor water tube.5. A building built-in air conditioning system, comprising: an externalheat exchanger; a reversing valve; a one-way valve; a dehumidifier; athrottle tube; a compressor; and a plurality of microporous tubes,wherein the microporous tubes are metal capillaries, PERT capillaries orPB capillaries, the microporous tubes are attached to a ceiling of abuilding and a floor of the building, each microporous tube has a firstend welded to a first guiding tube and a second end welded to a secondguiding tube, the plurality of microporous tubes are thus connected tothe guiding tubes in parallel, the first guiding tube on first ends ofthe microporous tubes is connected to the right-side port of thereversing valve 3 through the one-way valve 8, the upper port of theexternal heat exchanger 1 is connected to the left-side port of thereversing valve 3, the second guiding tubes on the second ends of themicroporous tubes is connected to the lower port of the external heatexchanger 1, a center common port of the reversing valve 3 is connectedto the return-air intake of the compressor 4, an inlet of the reversingvalve 3 is connected to an outlet of the compressor 4, the dehumidifier28 is connected to the one-way valve 8 in parallel and the throttle tube31 is connected between the outlet of the one-way valve and thedehumidifier
 28. 6. A building built-in air conditioning system,comprising: a base pile heat exchanger; a reversing valve; an compressorexpander; wherein the base pile heat exchanger 32 is formed by binding aplurality of microporous tubes around the building construction steelbars 12 and integrating the a plurality of microporous tubes with thebuilding construction steel bars 12 by casting, or micro holes can beformed in the building construction steel bars that are built in thebase pile, one end of the base pile heat exchanger 32 is connected tothe left side port of the reversing valve 3, the other end of the basepile heat exchanger 32 is connected to a guiding tube connected to oneend of the microporous tubes 9 attached to the ceiling or floor throughthe compressor expander
 33. 7. A building built-in air conditioningsystem, comprising: an external heat exchanger; a compressor; and aplurality of microporous tubes 12 or construction steel bars with microholes formed therein, wherein the plurality of microporous tubes orconstruction steel bars with micro holes are integrated with thebuilding concrete by casting, a guiding tube, which is connected to oneend of the microporous tubes or one end of the construction steel barswith micro holes, has an end connected the lower port of an externalheat exchanger through the throttle component 5, the upper port of theexternal heat exchanger 1 is connected to a side-port of the compressor,and the external heat exchanger is at least one of the heat exchangersincluding an air-cooled heat exchanger, a water-cooled heat exchanger, afoundation heat exchanger, and a solar panel heat exchanger.
 8. Abuilding built-in air conditioning system, comprising: an external heatexchanger; a reversing valve; a compressor; and a plurality ofmicroporous construction steel bars, wherein the plurality ofmicroporous construction steel bars are welded together to form anet-shaped heat exchanger first and then integrated with the buildingconcrete by casting, the plurality of microporous construction steelbars are connected to the a first guiding tube and a second guiding tubein parallel, a first guiding tube is connected to an lower port of theexternal heat exchanger 1 through the throttle component 5, the upperport of the external heat exchanger 1 is connected to the left-side portof the reversing valve 3, a center common port of the reversing valve 3is connected to the return-air intake of the compressor 4, an inlet ofthe reversing valve 3 is connected to an outlet of the compressor
 4. 9.A building built-in air conditioning system, comprising: an externalheat exchanger; a reversing valve; a compressor; and a plurality ofmetal radiation plate; wherein each metal radiation plate is formed byheat pressing two metal plates face to face into one piece, a pluralityof grooves are formed on the two metal plates correspondingly and whenthe two plate are heat-pressed, the corresponding grooves form aplurality of guiding channels, the metal radiation plate is installed onthe floor, ceiling or side walls of the building, an inlet of the metalradiation plate is connected to left-side port of the reversing valve 3,an outlet of the metal radiation plate is connected to the lower port ofthe external heat exchanger 1 through the throttle component 5, theupper port of the external heat exchanger 1 is connected to theleft-side port of the reversing valve 3, a center common port of thereversing valve 3 is connected to the return-air intake of thecompressor 4, an inlet of the reversing valve 3 is connected to anoutlet of the compressor 4, the external heat exchanger is at least oneof the heat exchangers including an air-cooled heat exchanger, awater-cooled heat exchanger, a foundation heat exchanger, and a solarpanel heat exchanger.
 10. A building built-in air conditioning system,comprising: an external heat exchanger; a reversing valve; a compressor;and a plurality of microporous tubes; wherein the microporous tubes aremetal capillaries, PERT capillaries or PB capillaries, the microporoustubes are attached to a ceiling of a building or a floor of thebuilding, each microporous tube has a first end welded to a firstguiding tube and a second end welded to a second guiding tube, theplurality of microporous tubes are thus connected to the guiding tubesin parallel, the first guiding tube is connected to the right-side portof the reversing valve 3, the upper port of the external heat exchanger1 is connected to the left-side port of the reversing valve 3, a centercommon port of the reversing valve 3 is connected to the return-airintake of the compressor 4, an inlet of the reversing valve 3 isconnected to an outlet of the compressor 4, when the microporous tubesare connected in parallel and when heating is the main function of theair conditioning system, the total cross-sectional area of themicroporous tubes should be larger than or at least equal to the area ofthe outlet of the compressor, wherein the total cross-sectional area ofthe microporous tubes equals cross-sectional area of each microporoustube multiplying the total number of the microporous tubes; when coolingis the main function of the air conditioning system, the totalcross-sectional area of the microporous tubes should be larger than orat least equal to the area of the return-air intake of the compressor,wherein the total cross-sectional area of the microporous tubes equalscross-sectional area of each microporous tube multiplying the totalnumber of the microporous tubes; the total volume of the microporoustubes should satisfy the requirement of refrigerant oil ratio for theprocessor, wherein the total volume of the microporous tubes equals tothe length of the microporous tubes multiplying the totalcross-sectional area of the microporous tubes.